/*
 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
 * OF SUCH DAMAGE.
 *
 * This file is part of the lwIP TCP/IP stack.
 *
 * Author: Adam Dunkels <adam@sics.se>
 *
 */

#ifndef __LWIP_SOCKETS_H__
#define __LWIP_SOCKETS_H__

#include "lwip/opt.h"

#if LWIP_SOCKET /* don't build if not configured for use in lwipopts.h */

#include <stddef.h> /* for size_t */

#include "lwip/ip_addr.h"
#include "lwip/inet.h"

#ifdef __cplusplus
extern "C" {
#endif

/* members are in network byte order */
struct sockaddr_in {
	u8_t           sin_len;
	u8_t           sin_family;
	u16_t          sin_port;
	struct in_addr sin_addr;
	char           sin_zero[8];
};

struct sockaddr {
	u8_t sa_len;
	u8_t sa_family;
	char sa_data[14];
};

/* If your port already typedef's socklen_t, define SOCKLEN_T_DEFINED
   to prevent this code from redefining it. */
#if !defined(socklen_t) && !defined(SOCKLEN_T_DEFINED)
typedef u32_t socklen_t;
#endif

/* Socket protocol types (TCP/UDP/RAW) */
#define SOCK_STREAM 1
#define SOCK_DGRAM 2
#define SOCK_RAW 3

/*
 * Option flags per-socket. These must match the SOF_ flags in ip.h (checked in init.c)
 */
#define SO_DEBUG 0x0001       /* Unimplemented: turn on debugging info recording */
#define SO_ACCEPTCONN 0x0002  /* socket has had listen() */
#define SO_REUSEADDR 0x0004   /* Allow local address reuse */
#define SO_KEEPALIVE 0x0008   /* keep connections alive */
#define SO_DONTROUTE 0x0010   /* Unimplemented: just use interface addresses */
#define SO_BROADCAST 0x0020   /* permit to send and to receive broadcast messages (see IP_SOF_BROADCAST option) */
#define SO_USELOOPBACK 0x0040 /* Unimplemented: bypass hardware when possible */
#define SO_LINGER 0x0080      /* linger on close if data present */
#define SO_OOBINLINE 0x0100   /* Unimplemented: leave received OOB data in line */
#define SO_REUSEPORT 0x0200   /* Unimplemented: allow local address & port reuse */

#define SO_DONTLINGER ((int)(~SO_LINGER))

/*
 * Additional options, not kept in so_options.
 */
#define SO_SNDBUF 0x1001   /* Unimplemented: send buffer size */
#define SO_RCVBUF 0x1002   /* receive buffer size */
#define SO_SNDLOWAT 0x1003 /* Unimplemented: send low-water mark */
#define SO_RCVLOWAT 0x1004 /* Unimplemented: receive low-water mark */
#define SO_SNDTIMEO 0x1005 /* Unimplemented: send timeout */
#define SO_RCVTIMEO 0x1006 /* receive timeout */
#define SO_ERROR 0x1007    /* get error status and clear */
#define SO_TYPE 0x1008     /* get socket type */
#define SO_CONTIMEO 0x1009 /* Unimplemented: connect timeout */
#define SO_NO_CHECK 0x100a /* don't create UDP checksum */

/*
 * Structure used for manipulating linger option.
 */
struct linger {
	int l_onoff;  /* option on/off */
	int l_linger; /* linger time */
};

/*
 * Level number for (get/set)sockopt() to apply to socket itself.
 */
#define SOL_SOCKET 0xfff /* options for socket level */

#define AF_UNSPEC 0
#define AF_INET 2
#define PF_INET AF_INET
#define PF_UNSPEC AF_UNSPEC

#define IPPROTO_IP 0
#define IPPROTO_TCP 6
#define IPPROTO_UDP 17
#define IPPROTO_UDPLITE 136

/* Flags we can use with send and recv. */
#define MSG_PEEK 0x01 /* Peeks at an incoming message */
#define MSG_WAITALL                                                                                                    \
	0x02 /* Unimplemented: Requests that the function block until the full amount of data requested can be returned */
#define MSG_OOB                                                                                                        \
	0x04 /* Unimplemented: Requests out-of-band data. The significance and semantics of out-of-band data are           \
	        protocol-specific */
#define MSG_DONTWAIT 0x08 /* Nonblocking i/o for this operation only */
#define MSG_MORE 0x10     /* Sender will send more */

/*
 * Options for level IPPROTO_IP
 */
#define IP_TOS 1
#define IP_TTL 2

#if LWIP_TCP
/*
 * Options for level IPPROTO_TCP
 */
#define TCP_NODELAY 0x01   /* don't delay send to coalesce packets */
#define TCP_KEEPALIVE 0x02 /* send KEEPALIVE probes when idle for pcb->keep_idle milliseconds */
#define TCP_KEEPIDLE 0x03  /* set pcb->keep_idle  - Same as TCP_KEEPALIVE, but use seconds for get/setsockopt */
#define TCP_KEEPINTVL 0x04 /* set pcb->keep_intvl - Use seconds for get/setsockopt */
#define TCP_KEEPCNT 0x05   /* set pcb->keep_cnt   - Use number of probes sent for get/setsockopt */
#endif                     /* LWIP_TCP */

#if LWIP_UDP && LWIP_UDPLITE
/*
 * Options for level IPPROTO_UDPLITE
 */
#define UDPLITE_SEND_CSCOV 0x01 /* sender checksum coverage */
#define UDPLITE_RECV_CSCOV 0x02 /* minimal receiver checksum coverage */
#endif                          /* LWIP_UDP && LWIP_UDPLITE*/

#if LWIP_IGMP
/*
 * Options and types for UDP multicast traffic handling
 */
#define IP_ADD_MEMBERSHIP 3
#define IP_DROP_MEMBERSHIP 4
#define IP_MULTICAST_TTL 5
#define IP_MULTICAST_IF 6
#define IP_MULTICAST_LOOP 7

typedef struct ip_mreq {
	struct in_addr imr_multiaddr; /* IP multicast address of group */
	struct in_addr imr_interface; /* local IP address of interface */
} ip_mreq;
#endif /* LWIP_IGMP */

/*
 * The Type of Service provides an indication of the abstract
 * parameters of the quality of service desired.  These parameters are
 * to be used to guide the selection of the actual service parameters
 * when transmitting a datagram through a particular network.  Several
 * networks offer service precedence, which somehow treats high
 * precedence traffic as more important than other traffic (generally
 * by accepting only traffic above a certain precedence at time of high
 * load).  The major choice is a three way tradeoff between low-delay,
 * high-reliability, and high-throughput.
 * The use of the Delay, Throughput, and Reliability indications may
 * increase the cost (in some sense) of the service.  In many networks
 * better performance for one of these parameters is coupled with worse
 * performance on another.  Except for very unusual cases at most two
 * of these three indications should be set.
 */
#define IPTOS_TOS_MASK 0x1E
#define IPTOS_TOS(tos) ((tos)&IPTOS_TOS_MASK)
#define IPTOS_LOWDELAY 0x10
#define IPTOS_THROUGHPUT 0x08
#define IPTOS_RELIABILITY 0x04
#define IPTOS_LOWCOST 0x02
#define IPTOS_MINCOST IPTOS_LOWCOST

/*
 * The Network Control precedence designation is intended to be used
 * within a network only.  The actual use and control of that
 * designation is up to each network. The Internetwork Control
 * designation is intended for use by gateway control originators only.
 * If the actual use of these precedence designations is of concern to
 * a particular network, it is the responsibility of that network to
 * control the access to, and use of, those precedence designations.
 */
#define IPTOS_PREC_MASK 0xe0
#define IPTOS_PREC(tos) ((tos)&IPTOS_PREC_MASK)
#define IPTOS_PREC_NETCONTROL 0xe0
#define IPTOS_PREC_INTERNETCONTROL 0xc0
#define IPTOS_PREC_CRITIC_ECP 0xa0
#define IPTOS_PREC_FLASHOVERRIDE 0x80
#define IPTOS_PREC_FLASH 0x60
#define IPTOS_PREC_IMMEDIATE 0x40
#define IPTOS_PREC_PRIORITY 0x20
#define IPTOS_PREC_ROUTINE 0x00

/*
 * Commands for ioctlsocket(),  taken from the BSD file fcntl.h.
 * lwip_ioctl only supports FIONREAD and FIONBIO, for now
 *
 * Ioctl's have the command encoded in the lower word,
 * and the size of any in or out parameters in the upper
 * word.  The high 2 bits of the upper word are used
 * to encode the in/out status of the parameter; for now
 * we restrict parameters to at most 128 bytes.
 */
#if !defined(FIONREAD) || !defined(FIONBIO)
#define IOCPARM_MASK 0x7fU    /* parameters must be < 128 bytes */
#define IOC_VOID 0x20000000UL /* no parameters */
#define IOC_OUT 0x40000000UL  /* copy out parameters */
#define IOC_IN 0x80000000UL   /* copy in parameters */
#define IOC_INOUT (IOC_IN | IOC_OUT)
/* 0x20000000 distinguishes new &
   old ioctl's */
#define _IO(x, y) (IOC_VOID | ((x) << 8) | (y))

#define _IOR(x, y, t) (IOC_OUT | (((long)sizeof(t) & IOCPARM_MASK) << 16) | ((x) << 8) | (y))

#define _IOW(x, y, t) (IOC_IN | (((long)sizeof(t) & IOCPARM_MASK) << 16) | ((x) << 8) | (y))
#endif /* !defined(FIONREAD) || !defined(FIONBIO) */

#ifndef FIONREAD
#define FIONREAD _IOR('f', 127, unsigned long) /* get # bytes to read */
#endif
#ifndef FIONBIO
#define FIONBIO _IOW('f', 126, unsigned long) /* set/clear non-blocking i/o */
#endif

/* Socket I/O Controls: unimplemented */
#ifndef SIOCSHIWAT
#define SIOCSHIWAT _IOW('s', 0, unsigned long) /* set high watermark */
#define SIOCGHIWAT _IOR('s', 1, unsigned long) /* get high watermark */
#define SIOCSLOWAT _IOW('s', 2, unsigned long) /* set low watermark */
#define SIOCGLOWAT _IOR('s', 3, unsigned long) /* get low watermark */
#define SIOCATMARK _IOR('s', 7, unsigned long) /* at oob mark? */
#endif

/* commands for fnctl */
#ifndef F_GETFL
#define F_GETFL 3
#endif
#ifndef F_SETFL
#define F_SETFL 4
#endif

/* File status flags and file access modes for fnctl,
   these are bits in an int. */
#ifndef O_NONBLOCK
#define O_NONBLOCK 1 /* nonblocking I/O */
#endif
#ifndef O_NDELAY
#define O_NDELAY 1 /* same as O_NONBLOCK, for compatibility */
#endif

#ifndef SHUT_RD
#define SHUT_RD 0
#define SHUT_WR 1
#define SHUT_RDWR 2
#endif

/* FD_SET used for lwip_select */
#ifndef FD_SET
#undef FD_SETSIZE
/* Make FD_SETSIZE match NUM_SOCKETS in socket.c */
#define FD_SETSIZE MEMP_NUM_NETCONN
#define FD_SET(n, p) ((p)->fd_bits[(n) / 8] |= (1 << ((n)&7)))
#define FD_CLR(n, p) ((p)->fd_bits[(n) / 8] &= ~(1 << ((n)&7)))
#define FD_ISSET(n, p) ((p)->fd_bits[(n) / 8] & (1 << ((n)&7)))
#define FD_ZERO(p) memset((void *)(p), 0, sizeof(*(p)))

typedef struct fd_set {
	unsigned char fd_bits[(FD_SETSIZE + 7) / 8];
} fd_set;

#endif /* FD_SET */

/** LWIP_TIMEVAL_PRIVATE: if you want to use the struct timeval provided
 * by your system, set this to 0 and include <sys/time.h> in cc.h */
#ifndef LWIP_TIMEVAL_PRIVATE
#define LWIP_TIMEVAL_PRIVATE 1
#endif

#if LWIP_TIMEVAL_PRIVATE
struct timeval {
	long tv_sec;  /* seconds */
	long tv_usec; /* and microseconds */
};
#endif /* LWIP_TIMEVAL_PRIVATE */

void lwip_socket_init(void);

int lwip_accept(int s, struct sockaddr *addr, socklen_t *addrlen);
int lwip_bind(int s, const struct sockaddr *name, socklen_t namelen);
int lwip_shutdown(int s, int how);
int lwip_getpeername(int s, struct sockaddr *name, socklen_t *namelen);
int lwip_getsockname(int s, struct sockaddr *name, socklen_t *namelen);
int lwip_getsockopt(int s, int level, int optname, void *optval, socklen_t *optlen);
int lwip_setsockopt(int s, int level, int optname, const void *optval, socklen_t optlen);
int lwip_close(int s);
int lwip_connect(int s, const struct sockaddr *name, socklen_t namelen);
int lwip_listen(int s, int backlog);
int lwip_recv(int s, void *mem, size_t len, int flags);
int lwip_read(int s, void *mem, size_t len);
int lwip_recvfrom(int s, void *mem, size_t len, int flags, struct sockaddr *from, socklen_t *fromlen);
int lwip_send(int s, const void *dataptr, size_t size, int flags);
int lwip_sendto(int s, const void *dataptr, size_t size, int flags, const struct sockaddr *to, socklen_t tolen);
int lwip_socket(int domain, int type, int protocol);
int lwip_write(int s, const void *dataptr, size_t size);
int lwip_select(int maxfdp1, fd_set *readset, fd_set *writeset, fd_set *exceptset, struct timeval *timeout);
int lwip_ioctl(int s, long cmd, void *argp);
int lwip_fcntl(int s, int cmd, int val);

#if LWIP_COMPAT_SOCKETS
#define accept(a, b, c) lwip_accept(a, b, c)
#define bind(a, b, c) lwip_bind(a, b, c)
#define shutdown(a, b) lwip_shutdown(a, b)
#define closesocket(s) lwip_close(s)
#define connect(a, b, c) lwip_connect(a, b, c)
#define getsockname(a, b, c) lwip_getsockname(a, b, c)
#define getpeername(a, b, c) lwip_getpeername(a, b, c)
#define setsockopt(a, b, c, d, e) lwip_setsockopt(a, b, c, d, e)
#define getsockopt(a, b, c, d, e) lwip_getsockopt(a, b, c, d, e)
#define listen(a, b) lwip_listen(a, b)
#define recv(a, b, c, d) lwip_recv(a, b, c, d)
#define recvfrom(a, b, c, d, e, f) lwip_recvfrom(a, b, c, d, e, f)
#define send(a, b, c, d) lwip_send(a, b, c, d)
#define sendto(a, b, c, d, e, f) lwip_sendto(a, b, c, d, e, f)
#define socket(a, b, c) lwip_socket(a, b, c)
#define select(a, b, c, d, e) lwip_select(a, b, c, d, e)
#define ioctlsocket(a, b, c) lwip_ioctl(a, b, c)

#if LWIP_POSIX_SOCKETS_IO_NAMES
#define read(a, b, c) lwip_read(a, b, c)
#define write(a, b, c) lwip_write(a, b, c)
#define close(s) lwip_close(s)
#define fcntl(a, b, c) lwip_fcntl(a, b, c)
#endif /* LWIP_POSIX_SOCKETS_IO_NAMES */

#endif /* LWIP_COMPAT_SOCKETS */

#ifdef __cplusplus
}
#endif

#endif /* LWIP_SOCKET */

#endif /* __LWIP_SOCKETS_H__ */
